Sample for ViewModel/Navigation

[yschimke]

Ideally enough to replace hiltViewModel

Two things so far

1. Composable factory method

commonMain

@Composable
inline fun <reified VM : ViewModel> metroViewModel(
    viewModelStoreOwner: ViewModelStoreOwner =
        checkNotNull(LocalViewModelStoreOwner .current) {
            "No ViewModelStoreOwner was provided via LocalViewModelStoreOwner"
        },
    key: String? = null
): VM {
    return viewModel(viewModelStoreOwner, key, factory = metroViewModelProviderFactory())
}

@Composable
expect fun metroViewModelProviderFactory(): ViewModelProvider.Factory

androidMain

@Composable
actual fun metroViewModelProviderFactory(): ViewModelProvider.Factory {
    return (LocalActivity.current as HasDefaultViewModelProviderFactory).defaultViewModelProviderFactory
}

@Inject
class MainActivity(
    private val viewModelFactory: ViewModelProvider.Factory
) : ComponentActivity() {
...
    override val defaultViewModelProviderFactory: ViewModelProvider.Factory
        get() {
            return viewModelFactory
        }

Second - some way to inject the SavedStateHandle

[ZacSweers]

Contributed in https://github.com/ZacSweers/metro/tree/main/samples/compose-navigation-app